TOA A-903MK2 80W Single-Channel Mixer Amplifier

The A-903MK2 Mixer Power Amplifier controls and mixes up to eight independent input signals. The Mixer Power Amplifier delivers up to 30 watts of output power. Optional plug-in modules are available for use with mixer power amplifier to provide versatility for a wide range of operating applications.

TOA A-903MK2 Features

• Controls and mixes up to 8 independent input signals
• Delivers up to 30 watts of output power

• A-903MK2 80W single-channel mixer amplifier1

• Type8-channel mixer power amplifier
• Power RequirementAC mains, 120 V, 60 Hz
• Power Consumption60W
• Output Power30W RMS
• Power Band Width(D) 20 〜 20,000 Hz, 0.5% THD, (T) 50 〜 20,000 Hz, 0.5% THD
• Frequency Response
  • (D) 20 〜 20,000 Hz, ±1 dB
  • (T) 20 〜 15,000 Hz, ±1 dB, (T) 20 〜 20,000 Hz, +1 dB, -3 dB
• THD0.02% at 1kHz, rated output
• Inputs
  • Eight Input Ports : Each port accepts any input modules
  • One Bridging Input/Output
• Input Sensitivity / Impedance
  • Input Port #1 to #8 : 100 mV/10 kΩ
  • Bridging Input/Output : 100 mV/3.3 kΩ
• Preamp OUT / Power Amp IN1000 mV into 600 Ω/1000 mV, 10 kΩ
• Outputs (T)=transformer, (D)=direct
  • Main (T) : 4 Ω, 25 and 70 volts, balanced, Main (D) : 8 Ω, unbalanced
  • Aux : 10 kΩ, 1 V
• Otuput Regulation (1kHz)
  • (D) Less than 0.5 dB, no load to full load
  • (T) Less than 1.0 dB, no load to full load
• S/N Ratio(Band Pass 20 〜 20,000 Hz) Tone defeat switch on
  • Master volume min : 90 dB
  • Master volume max : 77 dB
  • Power amplifier only : 105 dB
• Tone ControlsBass : ±10 dB at 100 Hz, Treble : ±10 dB at 10 kHz
• Controls
  • 8 Input gain control 1 Master gain control 1 Bass control
  • 1 Treble control 1 Power ON/OFF switch 1 Tone defeat switch
  • 1 Low-Cut switch (60 Hz, 6 dB/octave)
• Indicators1 Power LED, 1 Protect LED, 1 Signal LED, 1 Normal LED, 1 Peak LED
• ProtectionSelf-protection, with AC fuse (inside)
• Connectors
  • Input No.1 to No.8 : Card-edge connector
  • Bridging, Mixer preamp. output, Power amp. input, Aux output : RCA phono jack
  • Output : Screw-terminal strip
  • Mute, Remote VR : Screw-terminal strip
  • AC outlet : 3-pin grounding type
  • AC power cord/plug : SJT, 3-prong type
• Temperature Range-10℃ 〜 +60℃ (12゜F 〜 140゜F)
• Dimensions (WxHxD)16.54" x 3.9" x 12.52"
• Weight17.2 pounds (7.8 kg)